Bring in large vessel mentioned in speech (4)
I believe the answer is:
earn
'bring in' is the definition.
('earn' can be a synonym of 'bring in')
'large vessel mentioned in speech' is the wordplay.
'large vessel' becomes 'urn' (I've seen this before).
'mentioned in speech' shows a homophone (sound like).
'urn' is a homophone of 'EARN'.
(Other definitions for earn that I've seen before include "Deserve - merit" , "Make; deserve" , "Acquire by one's efforts" , "Take in bread" , "Near (anag.)" .)